CN104808870A - Detection method of touch point of single-layer capacitive touch screen - Google Patents
Detection method of touch point of single-layer capacitive touch screen Download PDFInfo
- Publication number
- CN104808870A CN104808870A CN201410031617.XA CN201410031617A CN104808870A CN 104808870 A CN104808870 A CN 104808870A CN 201410031617 A CN201410031617 A CN 201410031617A CN 104808870 A CN104808870 A CN 104808870A
- Authority
- CN
- China
- Prior art keywords
- electrode
- resistance region
- touch
- signal value
- time
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
- G06F3/0443—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using a single layer of sensing electrodes
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0416—Control or interface arrangements specially adapted for digitisers
- G06F3/04166—Details of scanning methods, e.g. sampling time, grouping of sub areas or time sharing with display driving
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
- G06F3/0448—Details of the electrode shape, e.g. for enhancing the detection of touches, for generating specific electric field shapes, for enhancing display quality
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
- G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
- G06F2203/04104—Multi-touch detection in digitiser, i.e. details about the simultaneous detection of a plurality of touching locations, e.g. multiple fingers or pen and finger
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Human Computer Interaction (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Quality & Reliability (AREA)
- Position Input By Displaying (AREA)
Abstract
The invention relates to a detection method of a touch point of a single-layer capacitive touch screen. The method comprises the following steps: charging multiple first electrodes in time of 1T, then sensing in sequence, air-connecting non-sensed first and second electrodes to acquire a first signal value A1T; charging multiple second electrodes in time of 1T, then sensing in sequence, air-connecting non-sensed second and first electrodes to acquire a second signal value B1T; charging multiple first electrodes in time of 3T, then sensing in sequence, air-connecting non-sensed first and second electrodes to acquire a third signal value A2T; charging multiple second electrodes in time of 3T, then sensing in sequence, air-connecting non-sensed second and first electrodes to acquire a fourth signal value B2T, wherein T is charge and discharge time for driving and sensing single cycle of a circuit.
Description
Technical field
The present invention relates to a kind of method for detecting of touch screen touch point, particularly relate to a kind of driving method of touch point of single capacitor conductive layer formula touch-screen.
Background technology
In recent years, along with high performance and the diversified development of the various electronic equipments such as mobile phone and touch navigation system, the electronic equipment installing the touch-screen of light transmission before the display devices such as liquid crystal progressively increases.The user of such electronic equipment, by touch-screen, carries out visual confirmation to the displaying contents of the display device being positioned at the touch-screen back side, while utilize the modes such as finger or pen to press touch-screen to operate.Thus, can the various functions of operating electronic equipment.
According to the principle of work of touch-screen and the difference of transmission medium, existing touch-screen comprises Four types, is respectively resistance-type, condenser type, infrared-type and surface acoustic wave type.Wherein utilize the capacitive touch screen of single conductive layer because thickness is thin, accuracy is higher, antijamming capability is applied by force comparatively extensive.
In prior art, the structure of single capacitor conductive layer formula touch-screen for form multipair leg-of-mutton electrode as unit detecting unit in single conductive layer, described leg-of-mutton electrode can extend in X direction, and multipair triangular-shaped electrodes is arranged side by side in the Y direction, with detecting touch point.But in described touch-screen, if two refer to simultaneously by being parallel to 2 points on described triangular-shaped electrodes direction (X-direction), then described touch-screen cannot be differentiated this and will be positioned at the position of coaxially going up at 2, therefore be difficult to realize multi-point touch at described touch-screen.
Summary of the invention
In view of this, necessaryly provide a kind of and can realize single conductive layer touch-screen of multiple point touching and the driving method of this touch-screen.
A method for detecting for touch screen touch point, this touch-screen comprises: a conducting film, and described conducting film comprises multiple first electrode and multiple second electrode extends in X direction, is replacing and interval setting perpendicular to mutual in the Y-direction of X-direction; Described first electrode comprises one first different resistance region N of resistance value successively in X-direction
1, one second resistance region N
2, and one the 3rd resistance region N
3, described second electrode comprises one the 3rd different resistance region M of resistance value in the X direction successively
3, one second resistance region M
2, and one first resistance region M
1; Multiple first contact conductor and multiple second contact conductor are arranged at described conducting film both sides relative in the X direction respectively, and described multiple first contact conductor is electrically connected with the first electrode, and multiple second contact conductor is electrically connected with multiple second electrode; Described method for detecting comprises the following steps: step S10, within the time of 1T, described driving sensing circuit charges to described multiple first electrode, then senses successively described first electrode, the first electrode do not sensed and the second electrode sky connect, and obtain one first signal value A
1T; Step S20, within the time of 1T, how described multiple second electrode of described driving sensing circuit charges, and then senses successively described second electrode, and described the second electrode of not sensing and the first electrode sky connect, and obtain a secondary signal value B
1T; Step S30, within the time of 3T, charges to described multiple first electrode, then senses successively described first electrode, and the first electrode do not sensed and described second electrode sky connect, and obtains one the 3rd signal value A
2T; Step S40, within the time of 3T, charge, then sense successively described second electrode described multiple second electrode, the second electrode do not sensed and the first electrode sky connect, and obtain one the 4th signal value B
2T; Wherein, T is the discharge and recharge time of described driving sensing circuit single cycle, by described first signal value A
1T, secondary signal value B
1T, the 3rd signal value A
2Tand the 4th signal value B
2Tcalculate X-direction two touch point coordinates.
Compared to prior art, by the transparency conducting layer in touch-screen is carried out patterned process in the X direction, form the region that multiple resistance value is different, and then by applying the drive current of different duration, and obtain signal value at least more than two, the coordinate of two different touch points in the X direction can be calculated by described signal value, breach and be positioned at 2 coaxial problems that can not judge in single conducting film.
Accompanying drawing explanation
The touch screen structure schematic diagram that Fig. 1 provides for the embodiment of the present invention.
The structural representation of conductive layer in the touch screen structure that Fig. 2 provides for the embodiment of the present invention.
The method for detecting process flow diagram of the touch screen touch point that Fig. 3 provides for the embodiment of the present invention.
Schematic diagram when Fig. 4 is embodiment of the present invention detecting touch point TP1 and TP2.
The touch screen structure schematic diagram that Fig. 5 provides for second embodiment of the invention.
Main element symbol description
| Touch-screen | 100，200 |
| Dielectric base | 10 |
| Conductive layer | 12 |
| Drive sensing circuit | 14 |
| First electrode | 122 |
| Second electrode | 124 |
| First depression | 1222 |
| Second depression | 1224 |
| First contact conductor | 1221 |
| Second contact conductor | 1241 |
| First resistance region | M 1，N 1 |
| Second resistance region | M 2，N 2 |
| 3rd resistance region | M 3，N 3 |
Following embodiment will further illustrate the present invention in conjunction with above-mentioned accompanying drawing.
Embodiment
The method for detecting of the touch point of embodiment of the present invention touch-screen and this touch-screen is described in detail below with reference to accompanying drawing.
See also Fig. 1 and Fig. 2, first embodiment of the invention provides a kind of monolayer capacitive touch screen 100, described monolayer capacitive touch screen 100 comprises a dielectric base 10, and be arranged at the conductive layer 12 on dielectric base 10 surface, described conductive layer 12 comprises more than one the first electrode 122, and multiple second electrode 124.Each first electrode 122 described and each the second electrode 124 extend all in the same direction, and perpendicular on bearing of trend, described multiple first electrode 122 and multiple second electrode 124 alternately and interval arrange.Described first electrode 122 and described second electrode 124 are the electrode of patterning.
Described dielectric base 10 is the structure of a curved face type or plane.This dielectric base 10 has suitable transparency, and mainly plays a part to support.This dielectric base 10 is formed by the hard materials such as glass, quartz, adamas or plastics or flexible material.Particularly, described flexible material may be selected to be the polyester materials such as polycarbonate (PC), polymethylmethacrylate (PMMA), tygon (PE), polyimide (PI) or polyethylene terephthalate (PET), or the material such as polyethersulfone (PES), cellulose esters, Polyvinylchloride (PVC), benzocyclobutene (BCB) or acryl resin.In the present embodiment, described dielectric base 10 is the structure of a plane, and this dielectric base 10 is flexible polycarbonate (PC).Be appreciated that the material forming described dielectric base 10 is not limited to the above-mentioned material enumerated, as long as dielectric base 10 can be made to play the effect of support, and there is suitable transparency.
Described conductive layer 12 can be a transparency conducting layer, and its material can be any one in a carbon nanotube layer, a tin indium oxide (ITO) conductive layer, tin monoxide antimony (TAO) conductive layer etc., also can select as required.Described conductive layer 12 comprises multiple first electrode 122 and multiple second electrode 124 replaces and interval is arranged, and concrete, described multiple first electrode 122 and described multiple second electrode 124 be (as from left to right) extension in the same direction.The bearing of trend defining described first electrode 122 or the second electrode 124 is X-direction, and the direction perpendicular to described bearing of trend is Y-direction.In the Y direction, the first adjacent electrode 122 and the second electrode 124 are alternately arranged in complementary.Described complementary be alternately arranged refer to described first electrode 122 and the second electrode 124 spaced and be arranged alternately, and the shape of the first electrode 122 and the second electrode 124 complements one another, to enable the touch-control investigative range of described touch-screen 100 cover described dielectric base 100 comprehensively, and make the calculating of touch point coordinate more accurate.The distance at described first electrode 122 and the second electrode 124 interval can be selected according to the touch-control resolution of described touch-screen 100, to meet the actual requirement of distinct device.
Going up in X direction, the shape of described first electrode 122 can be an end area comparatively greatly, and reduces gradually in X direction, and the other end area made is less.The shape entirety of described first electrode 122 can triangular in shape, rectangle, trapezoidal, rhombus or its combination in any.The shape of described second electrode 124 can be identical with the shape of described first electrode 122, and one end of described second electrode 124 larger area and described first electrode 122 are compared with the complementary arrangement in one end of small size; One end of described second electrode 124 larger area and described first electrode 122 are compared with the complementary arrangement in one end of small size.
Described first electrode 122 comprises one first resistance region N in X direction successively
1, one second resistance region N
2, and one the 3rd resistance region N
3.Described first resistance region N
1there is one first resistance value R in the X direction
n1, described second resistance region N
2there is one second resistance value R in the X direction
n2, described 3rd resistance region N
3there is the 3rd resistance value R in the X direction
n3, and R
n1≠ R
n2≠ R
n3.Namely described first electrode 122 has the different region of three resistances in the X direction.Equally, described second electrode 124 is comprising one the 3rd resistance region M in X direction successively
3, one second resistance region M
2, and one first resistance region M
1.Further, described 3rd resistance region M
3, the second resistance region M
2, and the first resistance region M
1resistance value is in the X direction respectively R
m3, R
m2, R
m1, and R
m1≠ R
m2≠ R
m3.
See also Fig. 2, described different resistance region is formed by the mode arranging at least one depression, and described depression is used for described first electrode 122 and the second electrode 124 to be divided into different resistance regions.In the present embodiment, described first electrode 122 global shape is triangle, and described first electrode 122 has two first depressions 1222 relatively recessed to described first electrode 122 inside from described first electrode 122 edge along Y-direction in middle position.Described two first relatively recessed depressions 1222 do not connect, and the region of the first electrode 122 therefore between described the first relatively recessed depression 1222 forms described second resistance region N
2, be positioned at described the first relatively recessed depression 1222 both sides in the X direction in described first electrode 122 and be respectively the first resistance region N
1and the 3rd resistance region N
3.Due to described first resistance region N
1, the second resistance region N
2and the 3rd resistance region N
3area all not identical, therefore in the X direction, described first resistance region N
1, the second resistance region N
2and the 3rd resistance region N
3there is different resistance values.The shape of described first depression 1222 can be the geometric configuratioies such as rectangle, semicircle, triangle, also can be other geometric configuratioies.In the present embodiment, the shape of described first depression 1222 is rectangle.Be appreciated that described first depression 1222 relatively recessed settings are only specific embodiment, the position of described first depression 1222 is not limited to above act, as long as can form three different resistance regions.Further, the object of described first depression 122 and the second depression 1224 is that described first electrode 122 and the second electrode 124 are divided into different resistance regions, therefore be that described first depression 1222 of raising and the second depression 1224 are more short better in the X direction, to reduce described first depression 1222 and the second impact of depression 1224 on the rate respectively in X-direction, improve described touch-screen 100 resolution in the X direction.
Described first depression 1222 and the second recessed degree of depth of depression 1224 and the length extended in the X direction can be selected according to the discharge and recharge time of described driving sensing circuit 14, to make within the discharge and recharge time of single, described charging current only can by the first resistance region M
1and the first resistance region N
1electric capacity be full of, and within the discharge and recharge time of 3 times, described charging current can be made described first resistance region, the second resistance region and the 3rd resistance region to be all full of.
Be appreciated that, the foregoing is only specific embodiment, described first electrode 122 also only can comprise one first depression 1222, also multiple first depressions 1222 spaced apart in X direction can be comprised, thus described first electrode 122 is formed the different resistance region of at least three resistance values in the X direction, as five resistance regions, seven resistance regions etc.
Equally, described second electrode 124 middle position has the second relatively recessed depression 1242, thus described second electrode 124 is divided into the 3rd resistance region M
3, the second resistance region M
2, and the first resistance region M
1.The shape of described second depression 1242 can be substantially identical with the first groove 1222.Further, coordinate is overlapping in the X-axis direction with described first groove 1222 for described second depression 1242, thus makes each resistance region one_to_one corresponding respectively of described first electrode 124 and described second electrode 124.Be appreciated that described second depression 1242 relatively recessed settings are only specific embodiment, the position of described second depression 1242 is not limited to above act.
By described first electrode 122 and the second electrode 124 are formed the different resistance region of at least three resistance values respectively, make described touch-screen 100 can detect at least two touch points judged in X-direction simultaneously, and there is higher sensitivity and degree of accuracy.
Further, described monolayer capacitive touch screen 10 comprises multiple first contact conductor 1221 further and multiple second contact conductor 1241 is arranged at the relative both sides of described conductive layer 12 respectively, described multiple first contact conductor 1221 is electrically connected with described first electrode 122, and described multiple second contact conductor 1241 is electrically connected with described second electrode 124 respectively.
Further, described monolayer capacitive touch screen 10 comprises a driving sensing circuit 14, if the discharge and recharge time of described driving sensing circuit 14 single cycle is T.Described discharge and recharge time T is relevant to the charge-discharge circuit (RC Loading) in described driving sensing circuit 14.In the present embodiment, within the time of 1T, described driving sensing circuit 14 only can make the first resistance region N
1capacitor charging reach capacity; Successively, within the time of 2T, the second resistance region N can be made
2capacitor charging reach capacity; Within the time of 3T, then can make the 3rd resistance region N
3capacitor charging reach capacity.
Refer to Fig. 3, the present invention further provides a kind of method for detecting of described touch-screen 100 touch point, comprise the following steps:
Step S10, within the time of 1T, described driving sensing circuit 14 charges to described multiple first electrode 122, then senses successively described first electrode 122;
Step S20, within the time of 1T, described multiple second electrode 124 of described driving sensing circuit more than 14 charges, and then senses successively described second electrode 124;
Step S30, within the time of 3T, charges to described multiple first electrode 122, then senses successively described first electrode 122;
Step S40, within the time of 3T, charges to described multiple second electrode 124, then senses successively described second electrode 124.
In step slo, within the time of 1T, described driving sensing circuit 14 only can by the first resistance region N
1electric capacity be full of, and the second resistance region N
2and the 3rd resistance region N
3electric capacity then make described charging current to be full of due to the impact of resistance.Therefore, in detection process, only can obtain and be positioned at the first resistance region N
1touch point produce the first signal value A
1T.In addition, in the process of sensing first electrode 122, the first electrode 122 do not sensed and the second electrode 124 can empty connect, ground connection or input and the sensed equipotential signal of the first electrode 122.In the present embodiment, the first electrode 122 do not sensed and the second electrode 124 connect for sky.
In step S20, same, within the time of 1T, described driving sensing circuit 14 only can by the first resistance region M
1electric capacity be full of, and the second resistance region M
2and the 3rd resistance region M
3then because the impact of resistance makes charging current to be full of.Therefore, in detection process, the first resistance region M can only be obtained
1secondary signal value B
1T.Same, in the process of sensing second electrode 124, described the second electrode 124 of not sensing and the first electrode 122 may be selected to be that sky connects, ground connection or the equipotential signal of input one sensed second electrode 124.
In step s 30, within the time of 3T, described driving sensing circuit 14 is by described first resistance region N
1, the second resistance region N
2and described 3rd resistance region N
3electric capacity be all full of, therefore sensing process in, sense the first resistance region N by described first electrode 122
1, the second resistance region N
2and described 3rd resistance region N
33rd signal value A of the touch point generation of position
2T.In addition, in the process of sensing first electrode 122, the first electrode 122 do not sensed and the second electrode 124 can empty connect, ground connection or input and the sensed equipotential signal of the first electrode 122.In the present embodiment, the first electrode 122 do not sensed and the second electrode 124 connect for sky.
In step s 40, same, within the time of 3T, described driving sensing circuit 14 is by described first resistance region M
1, the second resistance region M
2and described 3rd resistance region M
3electric capacity be all full of, in detection process, described second electrode 124 can sense at the first resistance region M
1, the second resistance region M
2and described 3rd resistance region M
3touch point produce the 4th signal value B
2T.Same, in the process of sensing second electrode 124, described the second electrode 124 of not sensing and the first electrode 122 may be selected to be that sky connects, ground connection or the equipotential signal of input one sensed second electrode 124.
See also Fig. 4, if having two touch points TP1, TP2 in the X direction, described TP1 is relatively near the first electrode 122, and described TP2 is relatively near described second electrode 124.
The coordinate of described touch point is by above-mentioned A
1T, B
2T, A
3T, B
3Tcalculate.Concrete:
A
1T=A
1P；
A
2T=A
1P+A
2P；
B
1T=B
1P；
B
2T=B
1P+B
2P；
Wherein, A
1P, B
1Pbe respectively the signal value that the touch point TP1 that detected by the first electrode 122 and the second electrode 124 is caused, A
2P, B
2Pbe respectively the signal value that the touch point TP2 that detected by the first electrode 122 and the second electrode 124 is caused.
Arrive can be obtained fom the above equation:
A
1P=A
1T；
B
1P=B
2T-B
2P=B
2T-B
1T；
A
2P=A
2T-A
1P=A
2T-A
1T；
B
2P=B
1T。
Then the coordinate of described touch point TP1 and touch point TP2 is by following formulae discovery:
；
。
P in formula
xfor touch-screen is at the resolution of X-direction, can set, as the arbitrary value in 480 to 1024 according to driving the chip performance of sensing circuit.
Further, X is passed through
1and X
2, also can correct whether two touch or single-point touches further.If described touch-screen is l at the discernmible distance threshold of X-direction
0if calculate the X obtained
1and X
2closely, the threshold value l of setting has such as been less than
0, namely | X
1-X
2| <l
0, then can think that single-point touches, the mode that the process of down-stream all touches with single-point is carried out, thus can judge on coaxial direction direction it is that single-point touches or two touch more accurately, and can be sensitiveer make corresponding reaction.Described l
0value can select according to the requirement of described touch-screen resolution in the X direction and sensitivity.
Be appreciated that when described first electrode 122 is divided into n(n>3 respectively) individual resistance region time, be then nT by the time that a described n resistance region is full of; Same, when described second electrode 124 is divided into m resistance region respectively, be then mT by the time that a described m resistance region is full of.Pass through Multiple-Scan, the signal value of the first touch point can be obtained in certain single pass, the signal value of the second touch point can be obtained in other certain scanning once, by obtain more than 2 groups different signal values, by calculate can obtain described in be positioned at the coordinate of the different touch points in X-direction.
The driving method of monolayer capacitive touch screen provided by the invention, by the transparency conducting layer in touch-screen is carried out patterned process in the X direction, form the region that multiple resistance value is different, and then by applying the drive current of different duration, and obtain signal value at least more than two, the coordinate of two different touch points in the X direction can be calculated by described signal value, breach and be positioned at 2 coaxial problems that can not judge in single conducting film, improve the accuracy of detection of position, touch point, and then the sensitivity of described touch-screen.
See also Fig. 5, second embodiment of the invention provides a kind of method for detecting of monolayer capacitive touch screen 200 touch point, described monolayer capacitive touch screen 200 comprises a dielectric base 10, and be arranged at the conductive layer 12 on dielectric base 10 surface, described conductive layer 12 comprises more than one the first electrode 122, and multiple second electrode 124.Each first electrode 122 described and each the second electrode 124 extend all in the same direction, and perpendicular on bearing of trend, described multiple first electrode 122 and multiple second electrode 124 alternately and interval arrange.Monolayer capacitive touch screen 20 described in second embodiment of the invention is substantially identical with monolayer capacitive touch screen 20 described in the first embodiment, and its difference is, described first electrode 122 comprises the resistance region N of more than three different resistance values in the X direction
1, N
2n
i; Described second electrode 124 also comprises the resistance region M of three different resistance values in the X direction
1, M
2m
i.
The present invention further provides the method for detecting that a kind of described monolayer capacitive touch screen 200 is positioned at two touch points TP1, TP2 of X-direction, comprise the steps:
Step S10, respectively at 1T, 3T, 5T ... in the time of iT, described driving sensing circuit 14 charges to described multiple first electrode 122, then senses successively described first electrode 122, obtains multiple first signal value A
1T, A
3Ta
iT;
Step S20, respectively at 1T, 3T, 5T ... in the time of iT, described multiple second electrode 124 of described driving sensing circuit more than 14 charges, and then senses successively described second electrode 124, obtains multiple secondary signal value B
1T, B
3Tb
iT.
The coordinate of described two touch points TP1, TP2 is by described multiple first signal value A
1T, A
3Ta
iTtake turns doing difference, and multiple secondary signal value B
1T, B
3Tb
iTtake turns doing poor mode to calculate.By by described multiple first signal values A successively
1T, A
3Ta
iTtake turns doing difference, the relation between the position that can obtain one group of touch point TP1 and TP2, then by by described multiple secondary signal value B
1T, B
3Tb
iTtake turns doing difference, the relation between the position obtaining other one group of touch point TP1 and TP2.By these two groups of position relationships, the coordinate of touch point TP1 and TP2 can be calculated.
Concrete, if the resistance region that touch point TP1, TP2 are positioned at the first electrode 122 is respectively N
j, N
k, then, for the second electrode 124, the resistance region at TP1, TP2 place, described touch point is respectively N
i-j, N
i-k.
Then by the first electrode 122 detected touch point TP1 place resistance region N
jtime signal value A
jTfor:
A
jT=A
1P+A
（j-2）T；
Wherein, A
1Pfor the signal value that the touch point TP1 detected by the first electrode 122 causes, A
(j-2) Tfor the N detected in (j-2) T time
j-2the signal value of all resistance regions before individual resistance region.
The resistance region N at the first electrode 122 detected touch point TP2 place
ktime signal value be:
A
kT=A
2P+A
（k-2）T；
Wherein, A
2Pfor the signal value that the touch point TP2 detected by the first electrode 122 causes, A
(k-2) Trepresent the N that touch point detects in (k-2) T time
k-2the signal value of all resistance regions before individual resistance region.
Same, by the second electrode 124 detected touch point TP2 place resistance region N
(i-k)time signal value be:
B
（i-k）T=B
1P+B
（i-k-2）T；
B
(i-k-2) Tfor the N detected in (i-k-2) T time
i-k-2the signal value of all resistance regions before individual resistance region.
By the second electrode 124 detect by the resistance region N at TP1 place, touch point
(i-j)time signal value be:
B
（i-j）T=B
2P+B
（i-j-2）T；
B
(i-j-2) Tfor the N detected in (i-j-2) T time
i-j-2the signal value of all resistance regions before individual resistance region.
Can be obtained by above formula:
A
1P=A
jT-A
(j-2)T；
A
2P=A
kT-A
(k-2)T；
B
1P=B
(i-k)T-B
(i-k-2)T;
B
2P=B
(i-j)T-B
(i-j-2)T。
The coordinate of touch point TP1 and TP2 then can be tried to achieve by above formula:
；
。
Wherein, P
xfor touch-screen is at the resolution of X-direction.
In addition, those skilled in the art also can do other change in spirit of the present invention, and certainly, these changes done according to the present invention's spirit, all should be included within the present invention's scope required for protection.
Claims (14)
1. a method for detecting for touch screen touch point, this touch-screen comprises:
One conductive layer, described conductive layer comprises multiple first electrode and multiple second electrode extends in X direction, perpendicular in the Y-direction of X-direction mutually alternately and interval arrange with sensing touch point;
Described first electrode comprises one first different resistance region N of resistance value successively in X-direction
1, one second resistance region N
2, and one the 3rd resistance region N
3, described second electrode comprises one the 3rd different resistance region M of resistance value in the X direction successively
3, one second resistance region M
2, and one first resistance region M
1;
Multiple first contact conductor and multiple second contact conductor are arranged at described conductive layer both sides relative in the X direction respectively, and described multiple first contact conductor is electrically connected with the first electrode, and multiple second contact conductor is electrically connected with multiple second electrode;
Described method for detecting comprises the following steps:
Step S10, within the time of 1T, described driving sensing circuit charges to described multiple first electrode, then senses successively described first electrode, obtains one first signal value A
1T;
Step S20, within the time of 1T, described driving sensing circuit charges to described multiple second electrode, then senses successively described second electrode, obtains a secondary signal value B
1T;
Step S30, within the time of 3T, described driving sensing circuit charges to described multiple first electrode, then senses successively described first electrode, obtains one the 3rd signal value A
2T;
Step S40, within the time of 3T, described driving sensing circuit charges to described multiple second electrode, then senses successively described second electrode, obtains one the 4th signal value B
2T;
Wherein, T is the discharge and recharge time of described driving sensing circuit single cycle, by described first signal value A
1T, secondary signal value B
1T, the 3rd signal value A
2Tand the 4th signal value B
2Tcalculate X-direction two touch point coordinates.
2. the method for detecting of touch screen touch point as claimed in claim 1, it is characterized in that, the material of described conductive layer is tin indium oxide, described first electrode and the second electrode triangular in shape in the X direction, and described first electrode and described second electrode are complementary arrangement.
3. the method for detecting of touch screen touch point as claimed in claim 2, it is characterized in that, have two first depressions relatively recessed to described first electrode interior from described first electrode edge along Y-direction in the middle of first electrode, described first depression both sides are respectively described first resistance region N
1and the second resistance region N
2, between two first relative depressions, form described 3rd resistance region N
3.
4. the method for detecting of touch screen touch point as claimed in claim 2, it is characterized in that, have two second depressions relatively recessed to described first electrode interior from described second electrode edge along Y-direction in the middle of first electrode, described second depression both sides are respectively described first resistance region M
1and the second resistance region M
2, between two second relative depressions, form described 3rd resistance region M
3.
5. the method for detecting of touch screen touch point as claimed in claim 1, is characterized in that, within the time of 1T, and described first resistance region N
1electric capacity be full of by described driving sensing circuit.
6. the method for detecting of touch screen touch point as claimed in claim 1, is characterized in that, within the time of 1T, and described first resistance region M
1electric capacity be full of by described driving sensing circuit.
7. the method for detecting of touch screen touch point as claimed in claim 1, is characterized in that, within the time of 3T, and described first resistance region N
1, the second resistance region N
2and described 3rd resistance region N
3electric capacity be all full of.
8. the method for detecting of touch screen touch point as claimed in claim 1, is characterized in that, within the time of 3T, and described first resistance region M
1, the second resistance region M
2and described 3rd resistance region M
3electric capacity be all full of.
9. the method for detecting of touch screen touch point as claimed in claim 1, is characterized in that, described two touch point coordinate X
1, X
2by following formulae discovery:
；
；
P in formula
xfor touch-screen is at the resolution of X-direction.
10. the method for detecting of touch screen touch point as claimed in claim 9, is characterized in that, if described touch-screen is l at the distance threshold that X-direction is differentiated
0, calculate | X
1-X
2|; When | X
1-X
2| <l
0time, for single-point touches.
The method for detecting of 11. touch screen touch points as claimed in claim 1, is characterized in that, described the first electrode of not sensing and the second electrode ground connection, sky connect or input an equipotential identical with sensed electrode.
The method for detecting of 12. 1 kinds of touch screen touch points, this touch-screen comprises:
One conductive layer, described conductive layer comprises multiple first electrode and multiple second electrode extends in X direction, perpendicular in the Y-direction of X-direction mutually alternately and interval arrange with sensing touch point;
Described first electrode comprises the different resistance region of i resistance value successively in X-direction, and described second electrode comprises the different resistance region of i resistance value in the X direction successively;
Multiple first contact conductor and multiple second contact conductor are arranged at described conductive layer both sides relative in the X direction respectively, and described multiple first contact conductor is electrically connected with the first electrode, and multiple second contact conductor is electrically connected with multiple second electrode;
Described method for detecting comprises the following steps:
Step S10, respectively at 1T, 3T, 5T ... in the time of iT, described driving sensing circuit charges to described multiple first electrode, then senses successively described first electrode, obtains multiple first signal value A
1T, A
3Ta
iT;
Step S20, respectively at 1T, 3T, 5T ... in the time of iT, how described multiple second electrode of described driving sensing circuit charges, and then senses successively described second electrode, obtains multiple secondary signal value B
1T, B
3Tb
iT.
The method for detecting of 13. touch screen touch points as claimed in claim 12, is characterized in that, by described multiple first signal value A
1T, A
3Ta
iTtake turns doing difference, and multiple secondary signal value B
1T, B
3Tb
iTtake turns doing the position that poor mode calculates touch point.
The method for detecting of 14. touch screen touch points as claimed in claim 13, it is characterized in that, the coordinate of described touch point is:
；
；
Wherein, P
xfor touch-screen is at the resolution of X-direction, A
jTbe the first TP1 place, electrode detection touch point resistance region N
jtime signal value; A
(j-2) Tfor the N that the first electrode detection in (j-2) T time arrives
j-2the signal value of all resistance regions before individual resistance region; A
(k-2) Trepresent the N that touch point detects in (k-2) T time
k-2the signal value of all resistance regions before individual resistance region; B
(i-k) Tby the second TP2 place, electrode detection touch point resistance region N
(i-k)time signal value; B
(j-k-2) Tfor the N detected in (i-k-2) T time
i-k-2the signal value of all resistance regions before individual resistance region; B
(i-j) Tfor by the second electrode detection to by the resistance region N at TP1 place, touch point
(i-j)time signal value; B
(i-j-2) Tfor the N detected in (i-j-2) T time
i-j-2the signal value of all resistance regions before individual resistance region.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410031617.XA CN104808870A (en) | 2014-01-23 | 2014-01-23 | Detection method of touch point of single-layer capacitive touch screen |
| TW103108072A TW201535210A (en) | 2014-01-23 | 2014-03-10 | Method for detecting touch points on a capacitive touch panel |
| US14/601,258 US20150205410A1 (en) | 2014-01-23 | 2015-01-21 | Method for detecting touch points on a capacitive touch panel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410031617.XA CN104808870A (en) | 2014-01-23 | 2014-01-23 | Detection method of touch point of single-layer capacitive touch screen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104808870A true CN104808870A (en) | 2015-07-29 |
Family
ID=53544768
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410031617.XA Pending CN104808870A (en) | 2014-01-23 | 2014-01-23 | Detection method of touch point of single-layer capacitive touch screen |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US20150205410A1 (en) |
| CN (1) | CN104808870A (en) |
| TW (1) | TW201535210A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11086466B1 (en) * | 2020-11-20 | 2021-08-10 | TPKTouch Solutions (Xiamen) Inc. | Electronic device with touch sensing function and touch sensing method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110048812A1 (en) * | 2009-09-03 | 2011-03-03 | Esat Yilmaz | Two-dimensional position sensor |
| US20110062969A1 (en) * | 2009-09-11 | 2011-03-17 | Kirk Hargreaves | Single layer capacitive image sensing |
| CN102902427A (en) * | 2011-07-26 | 2013-01-30 | 比亚迪股份有限公司 | Touch detection method and touch device |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH676056A5 (en) * | 1988-07-13 | 1990-11-30 | Aid 3 Group Ltd | |
| EP0435438B1 (en) * | 1989-12-28 | 1998-03-04 | Gunze Limited | Input system including resistance film touch panel |
| US5756904A (en) * | 1996-08-30 | 1998-05-26 | Tekscan, Inc. | Pressure responsive sensor having controlled scanning speed |
| US8017890B2 (en) * | 2004-07-20 | 2011-09-13 | Massachusetts Institute Of Technology | Continuous capacitive slider controller for a smooth surfaced cooktop |
| TW200805128A (en) * | 2006-05-05 | 2008-01-16 | Harald Philipp | Touch screen element |
| US7973771B2 (en) * | 2007-04-12 | 2011-07-05 | 3M Innovative Properties Company | Touch sensor with electrode array |
| US7735383B2 (en) * | 2008-06-24 | 2010-06-15 | Synaptics Incorporated | Balanced resistance capacitive sensing apparatus |
| TWI486851B (en) * | 2012-08-17 | 2015-06-01 | Mstar Semiconductor Inc | Self-capacitive touch panel |
| CN103631416A (en) * | 2012-08-24 | 2014-03-12 | 天津富纳源创科技有限公司 | Touch screen and touch-controlled display device |
| CN104881161B (en) * | 2014-02-27 | 2017-12-01 | 财团法人工业技术研究院 | Touch panel |
-
2014
- 2014-01-23 CN CN201410031617.XA patent/CN104808870A/en active Pending
- 2014-03-10 TW TW103108072A patent/TW201535210A/en unknown
-
2015
- 2015-01-21 US US14/601,258 patent/US20150205410A1/en not_active Abandoned
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110048812A1 (en) * | 2009-09-03 | 2011-03-03 | Esat Yilmaz | Two-dimensional position sensor |
| US20110062969A1 (en) * | 2009-09-11 | 2011-03-17 | Kirk Hargreaves | Single layer capacitive image sensing |
| CN102902427A (en) * | 2011-07-26 | 2013-01-30 | 比亚迪股份有限公司 | Touch detection method and touch device |
| CN102902433A (en) * | 2011-07-26 | 2013-01-30 | 比亚迪股份有限公司 | Touch detection method and touch control device |
Also Published As
| Publication number | Publication date |
|---|---|
| US20150205410A1 (en) | 2015-07-23 |
| TW201535210A (en) | 2015-09-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP6723226B2 (en) | Device and method for force and proximity sensing employing an intermediate shield electrode layer | |
| US9870109B2 (en) | Device and method for localized force and proximity sensing | |
| US9454255B2 (en) | Device and method for localized force sensing | |
| US20150084909A1 (en) | Device and method for resistive force sensing and proximity sensing | |
| US9262008B2 (en) | Method of recognizing touch | |
| US9600121B2 (en) | Driving sensor electrodes for noise measurement | |
| TWI506520B (en) | Method for detecting touch spot of capacitive touch panel | |
| US20150062063A1 (en) | Method of recognizing touch | |
| US9547030B2 (en) | Method of recognizing touch | |
| US9471173B2 (en) | Capacitive input sensing in the presence of a uniform conductor | |
| US10712863B2 (en) | Transcapacitive touch and force sensing in an input device | |
| US8976149B2 (en) | Capacitance sensing apparatus and method, and touch screen apparatus | |
| TW201516774A (en) | Method of determining touch point and touch pressure | |
| US9753587B2 (en) | Driving sensor electrodes for absolute capacitive sensing | |
| US9329740B2 (en) | Method of recognizing touch | |
| US20130155003A1 (en) | Touch sensing apparatus and method thereof | |
| CN109642835B (en) | Finger thermal compensation full-bridge strain gauge array | |
| US20160034092A1 (en) | Stackup for touch and force sensing | |
| US20160190987A1 (en) | Switched-capacitor harmonic-reject mixer | |
| US20150153869A1 (en) | Touchscreen device | |
| CN104808870A (en) | Detection method of touch point of single-layer capacitive touch screen | |
| US9569051B2 (en) | Method for detecting touch points on a touch panel | |
| KR20110103287A (en) | Method for recognising multi-touch of resistive type touch-screen | |
| CN103677477A (en) | Resistance type touch screen, touch point positioning method thereof and touch display device | |
| JP5401295B2 (en) | Touch panel and coordinate position detection method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| EXSB | Decision made by sipo to initiate substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150729 |
|
| WD01 | Invention patent application deemed withdrawn after publication |